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| * Access frame cache file by specifying frame_cache and instrument as in [[KAGRA/Subgroups/CAL/GstLAL/tutorials/step1|step2]] | * Access frame cache file by specifying frame_cache and instrument as in [[KAGRA/Subgroups/CAL/GstLAL/tutorials/step2|step2]] |
Step 3: Extract channels and make a new frame file
For the initialization and running the pipeline, please refer step1
Access frame cache file by specifying frame_cache and instrument as in step2
- Define a frame multiplexer(mux) to write channels into a frame file by specifying frame-type, frame_duration, frames_per_file, compression_scheme and compression_level
1 out_path = '.'
2 frame-type = 'TEST'
3 frame_duration = 4 # in seconds
4 frames_per_file = 1
5 compression_scheme = 257 #256: Raw 257: gzip
6 compression_level = 9
7
8 mux = pp.mkframecppchannelmux(pipeline, None)
9
10 mux.set_property("frame-duration", frame_duration)
11 mux.set_property("frames-per-file", frames_per_file)
12 mux.set_property("compression-scheme", compression_scheme)
13 mux.set_property("compression-level", compression_level)
14
15 # Link the strain branch to the muxer
16 strain_queue_length = 0 #short_queue
17 for pipe, chan in zip(pipe_list, channel_list):
18 cp.mkqueue(pipeline, pipe, strain_queue_length).get_static_pad("src").link(mux.get_request_pad(chan[1]))
19
20 mux = pp.mkprogressreport(pipeline, mux, "progress_sink_%s" % instrument)
21
22 pp.mkframecppfilesink(pipeline, mux, frame_type = frame_type, path = output_path, instrument = instrument)